Machine for applying waterproof coating to paper and other fabrics



c. 0. GAIVINI. MACHINE FOR APPLYING WATERPROOF COATING T0 PAPER AND OTHER FABRICS.

APPLICATION FILED JULY 28,1920- Patented Mar. 21, 1922.

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MACHINE FOR APPLYING WATERPROOF COATING T0 PAPER AND OTHER FABRICS.

APPLICATION FILED JULY 28,1920- Patented Mar. 21, 1922.

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CHARLES C. GAMM, OF ST. PAUL, MINNESOTA.

. MACHINE FOR APPLYING WATERPROOF COATING T0 PAPER AND-OTHER FABRICS.

Specification of Letters Patent.

Application filed July 28, 1920. Serial No. 399.642.

T 0 all whomit may concern Be it known that I, (.nAnLns C. (iAMM, a citizen of the l nited States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented new and useful Improvements in Machines for Applying \Vaterproof Coating to Paper or other Fabrics, of which the following is a specification.

My invention relates to improvements in machines for applying waterproof coating to paper or other fabrics.

My object is to provide a machine which will apply such coating efiiciently and economically.

A further object of my invention is to give paper or other fabrics an attractive glossfinish by the use of a minimum amount of coating material.

My machine is particularly adapted for rendering cartons or containers such as those used for butter and other foodstuffs imperviousto moisture and to give such containers a uniform gloss, finish, thereby making them sanitary, durable and attractive in appearance. To this end I first heat the cartons, then apply waterproofing material such as parafline in the liquid state, by means of two opposed rollers, next pass them through a cooling bath of water after which the excess moisture is removed and they are finally spaced for stacking on. a jogging table.

Referring to the accompanying drawings Figure 1 is an elevation of my improved machine including a part of the jogging table; Fig. 2 is an elevation of the remainder of the jogging table; Fig. 3 is a plan view of my machine; Fig. 4 is a central longitudinal section of a portion of one of the parafiine rolls; Fig. 5 is a transverse section of the same; Fig. 6 is a longitudinal section taken through the preheating device and Fig. 7 is a detail elevation of the feeding wheels and adjustable supporting arms.

In the drawings I have used the numeral 1 to indicate the supporting legsof my machine, 2 the frame, 3the feed table, 4 the feeding wheels, 5 a preheating device, 6 and 7 the parafiine rolls, 8 the paraffine reservoir, 9 the parafline vat, 10 and 10 a plurality of belts for carrying cartons through the water tank, 11 the water tank, 12 and 13 the rollers for removing excess moisture and 14. the jogging table.

The supporting legs 1 are angle irons rigidly secured at their upper ends to the corners of the frame 2. The frame 2 consists of longitudinal and transverse I beams arranged in a rectangle and having a plurality of pairs of brackets for the bearings of the several shafts rigidly mounted on the upper surfaces of the longitudinal beams.

The feed table 3 projects upward at an angle from the frame 2 and consists of three spaced plates extending transversely between and rigidly secured to the upper surface of a pair of supporting arms 15. The arms 15 are pivotally mounted on a pair of brackets 2 on the frame 2 by means of a shaft 16 which extends between said brackets and passes through perforations near the lower ends of said arms.

A pair of rods 17 (one for each arm 15) form an adjustable support for the upper end of the table 3 so that said table may be tilted at various angles with the horizontal. The upper end of said rods 17 are pivotally connected to the arms 15 and their lower ends pass through perforations in the upper flanges of the longitudinal I beams of the frame 2 and are adjustably secured to said flanges by means of the pairs of nuts 17. The nuts 17 being threaded on the rods 17 are adapted to engage the upper and lower surfaces of flanges adjacent to the perforations and may be turned upward to lower the feed table and downward to raise said table. The cartons to be coated are guided to the feeding wheels by four transversely slidable angle irons 18 which are held on the feed table by means of screws 19. The screws 19 are formed with knurled knobs on their upper ends, pass through perforations in the angles 18 and the spaces between the plates of the feed table 3 and their lower ends are threaded in two transverse bars 20, said bars being tapped at intervals to receive the screws 19. This arrangement allows the guiding angle irons 18 to be placed in different positions to adapt the machine to handle cartons of various sizes. The lower edge of the feed table 3 extends beneath the feeding wheels 4 to deliver cartons tothe periphery of said wheels.

These feeding wheels 4 are provided with a rubber covering 4 (Fig. 7 and are fast on a shaft 21, said shaft being journalled 1n and supported by two adjustable arms 22.

Qne end of the shaft 21 extends beyond one Patented Mar. 21, 192-2.,

of the arms 22 to receive a sprocket gear 23 which is revoluble on said shaft. The arms 22 are supported, at their ends on which the shaft 21 is journalled by a pair of rods 25, the opposite ends of said arms being bifurcated and pivoted on a shaft 24. A. rib 25 formed on each of the backets 2 is perforated to receivethe lowe end of each of the rods 25 and a, lug 22 formed on the end of each of the arms 22 is perforated to receive the upper end of each of said rods. A series of nuts 25 threaded on the rods 25, above and below each of the ribs 25 and (lugs 22 engage said lugs and ribs to supby manipulating hand lever woolen belts 33 fabric or carton blanks to the paraiiinev port the ends of the arms 22. Thus by changing the positions of the nuts 25 the ends of the arms 22 together with the shaft 21 and feeding wheels 4 may be raised or lowered.

As it is sometimes desirable to stop the feeding mechanism when the machine is in operation, I provide a clutch consisting of a 26, a longitudinally slidable collar 28 and suitable lugs on said collar and on the inner face of the ear 23. The lever 26 is pivotally mounted y means of a pin 27 on a branch of one of the bifurcated arms 22 adjacent to the gear 23. The collar 28 rotateswith the .shaft 21 but may be moved longitudinally thereon by means of a pin on the lever 26 which engages an annular mechanism may be stopped by disengaging the lug on the collar 28 the lever 26. A series of shafts 30, 21, and 32 as well as from the lug 23 the shaft 24 journalled near their ends in the frame 2 and having rollers 30",- 31*, 32* and 24 (Figs. 1,3 and 6) rigidly mounted thereon are provided to carry two endless and 34 and conduct the paper rollers and to heat them. The belts 33 and 34 extend substantially the width ofthe machine, the belt 33 being shorter than and positioned above the belt 34. The shaft 24 is drlven by a sprocket gear 24 and another gear 24 on the oppositeend of the shaft is adapted to drive the chain 29. The gear 24 is driven by a chain 35 from a sprocket gear 30 vfast on the end of the'shaft 30. The rollers 30 and 31 are driven in'opposite direction bymeshing pinion gear 30 and 31 located between the frame 2 and the end of the rollers 30 sprocket gear 30. The opposite end of the shaft 31 carries a sprocket gear 31 which is driven by a chain 36 from a larger gear 37 on the end of the shaft on which the paraffine roller 7 is mounted.

The endless woolen belts 33 and 34 are heated by the preheatingdevice 5 which and 31 near the consists of a rectangular casing 38 extending substantially the entire width of the belts 33 and 34 and having a plurality of gas burners 39 therein, said casing 38 being mounted between the upper and lower runs of the belt 34. Gas enters the burners through a pipe 39 connected to a gas supply, and a suction pipe 38, opening into the casing 38, is arranged to remove the burnt gases. The burners 39 consist of sections of pipe joined at their ends to make a continuous passage for gas and perforated at intervals to form gas jets. A plurality of apertures 38 in the ends of the casing 38 are provided to facilitate igniting the gas and for the admission of air.

The parafiine vat 9 is supported between the longitudinal beams of the frame 2 adjacent to the roller 31 and its ends are formed with suitable bearings for the lower paraffine roller 7. This roller to rotate within the vat, its ends being ournalled in hearings in the vat 9 which are provided with packing to prevent the liquid parafiine from esca ing. The roller 6 is arranged to rotate a Owe the vat 9 with its periphery in contact with the periphery of the roller .7. The ends of the roller 6 are journalled in and carried by a pair of arms 40 which are pivotally mounted on the ends of a shaft 41. This arrangement allows the roller 6 to be raised out of contact with the roller? as shown in dotted lines in Figure l. Adjustment of the contact pressure between the rollers 6' and 7 is secured by set screws 42 and retaining bolts 43. The set screws 42 are threaded in flanges 40 on the arms 40 and the ends of said screws bear against the top of a pair of brackets 2 to form a stop for downward movement of the arms 40. The retaining bolts 43 pass through perforations in the upper flanges of the frame 2 and the flanges 40 and are provided with nuts 43 on their upper ends. Thus by removing the nuts 43 the arms 40 may be raised to the dotted line position or the pressure between the rollers 6 and 7 may be adjusted by turning the set screws 42 and nuts 43 in the appropriate directions.

Details of the construction of the paraf-.

an axial gas burner 44, similar to the burner 39 of the pre-heater 5, extending its length,

and. has a plurality of perforations 6 whic admit air to the interior and permit the gas to be ignited.

The ends of the roller 6 are formed with bearings 6 which rotate in the arms 40 and the roller 7 is formed with a bearing 7 of similar construction, which extends through the endof the vat 9 at one end to receive a sprocket gear 46 for driving said roller. The roller 6 is driven by a sprocket gear 47 on the end of one of the bearings 6".

Mounting the roller 6 in the ends of the arms 40 as just described, in addition to afi'ording efficient means for adjusting the pressure bet-ween the parafline rollers 6 and 7, facilitates the making of repairs and allows the rollers to be separated when the machine is not in operation, thus preventing the contact pressure from cooled.

The parafline reservoir 8 is supported on the frame 2 by a pair of brackets 2 and is arranged to deposit liquid paraifine on the roller 6 from a plurality of pet cocks 48. Parafiine in the reservoir 8 and vat 9 is heated by gas burners 49 and 9'" respectively (similar to the burners 39 in the pre-heating device 5) severally arranged within compartments 8 and 9 in the bottoms of said reservoir and vat. A pair of handles 8 on each end of the reservoir 8 are provided to facilitate lifting the reservoir which is removable from the brackets 2*. A pair of curved guides 50 are; secured to the brackets 2 adjacent to the rollers 6 and 7 for the purpose of guiding the flat cartons between said rollers and to prevent parafline from splashing on the belts 33 and 34.

The cooling tank 11 is rectangular in shape and mounted between the longitudinal beams of the frame 2 near the parafiine vat 9. When in operation water enters the tank 11 through a pipe 51 and passes out through a. pipe 52 which extends upward Within said tank to a point near its top. The endless belts 10 and 10 which convey the carton blanks through the cooling tank are supported on a series of rollers 53 54 55 and 56 and a series of idler wheels 57. The rollers 53 and 54 are fast on shafts 53 and 54 said shafts being journalled at their ends in the brackets 2. The idler wheels 57 are journalled on the shaft 41 and the rollers 55 and 56 are fixed on the shafts 55 and 56, the latter shafts being journalled in a pair of brackets 2 The belts 10 are identical with each other and pass around the roller 53*, idlers 57 and roller 55*. The belts 10" are provided with a guide roller-58 which is journalled at its ends in a pair of arms 59 and these arms are pivotally mounted at their upper ends on the shaft 41 and provided with set screws 60 arranged to secure said arms in various positions. The belts 10 are arranged beneath the belts 10 and pass around the roller, 54 guide roller 58, roller 56 and beneath the idler wheels 57.

flattening the rollers when the adhering paraffine has- By this arrangement the upper sections of the belts 10 move in contact with the lower sections of the belts 10 and the guide roller 58 prevents the lower sections of the belts 10 from rubbing the upper sections of said belts Where they pass beneath the idlers 57.

The rollers 12 and 13 for removing excess moisture are faced with rubber and are journalled in the brackets 2 near the end of the tank 11 adjacent to the rollers 55 and 56 These rollers 12 and 13 are adapted to receive the cooled cartons from the belts 10 and 10 wipe the free moisture from them and deposit them on an endless belt 61 which travels on the jogging table 14.

The jogging table proper consists of a horizontal platform rigidly mounted on the longitudinal beams of the frame 2 by means of four le 62 and two guide strips 14 along the ongitudinal edges of said platform. The belt 61 substantially covers the upper surface of the table 14 and passes around two rollers 63 and 64 and atightener 65. The tightener 65 consists of a rod revolubly mounted at its ends in plates 66 on opposite sides of the frame 2, said plates being adjustably held between pairs of guides 67, by bolts 68. The bolts 68 are rigidly secured at their inner ends in the plates 66 and extend through slots, 68' in the frame 2. The nuts 68 on the outer ends of the bolts 68 are arranged to engage the frame 2, thereby holding the plates 66 and tightener 65 in various positions within the limit of the slots 68. The roller 64 is fast on a shaft 64 the ends of which are journalled in a pair of brackets 2. One end of the shaft 64 extends through the bracket 2 to receive a pulley wheel 69, said wheel being fixed on said shaft and arranged to be rotated by a belt 70, which is driven by a small pulley 71 on the shaft 55.

My machine receives powerfrom a suitable electric motor connected to a belt 72. This belt turns a pulley wheel 73 fixed on the shaft 55, said shaft being supplied with an overhung bearing 74 on a support 75. A sprocket gear 76, between the pulleys 71 and 73, on the shaft 55 is adapted to drive a chain 76 around the gear 46 and revolve the roll 6. A pinion gear 77 fast on the shaft 55 near the roller 55 meshes with a similar gear 78 on the shaft 56 for driving the roller 56. A pinion gear 79 on the opposite end of the shaft 56 engages an idler gear 80 to rotate a gear 81, which is fixed on the shaft 13 in the proper direction. The upper roller 12 is driven by contact with the periphery of the roller 13 and is adjustable vertically in the brackets 2 by means of two journal boxes 12 which are slidable in slots 82 and held down by set screws 83 threaded in suitable cover plates 84. A sprocket gear 85 fast on the shaft 56 adjacent to the gear 79 drives a chain 86 and thus rotates the gear 47. The gears 47 and 37 are formed integral with each other to secure co-action of the various parts hereinbefore described.

In operation the burners 39, 49, PP, 45" and 9 having been lighted, pal-affine is placed in the reservoir 8 where it is soon melted by the burners 19 and allowed to drip from the pet cocks 4L8 on the roller 6. The liquid parafline passes over the heated rolls 6 and 7 into the vat 9, which is allowed to fill to a point near its top, thus partially submerging the lower roller 7. The parafline in the vat 9 is kept in a liquid state by the heat from the burners 9 and is carried over the contact surface of the roller 7 by the porous covering of said roller. Thus both rolls are kept supplied with parafiine by the drip from the pet cocks 4C8. Water in the tank 11 is kept cool by a constant supply from the pipe 51 which overflows into the pipe 52, thus submerging the lower sections of the belts 10 and substantially the entire length of the belts 10.

The fiat paper cartons or other articles to be coated are stacked in two piles located respectively near each of the feeding wheels 1, on the slanting feed table 3 between the angle irons 18. The direction of rotation of the power pulley 73 being as indicated by an arrow in Figure l, the feeding wheels 4: will rotate to engage and draw the cartons one by one from the top of each of the piles and will deposit them on the upper surface of the belt 34. ward the roller 54: where the cartons will pass between the woolen belts 33 and 34 and be heated on both sides, said belts being kept hot by the preheating device 5. As the cartons emerge from between the rollers 30 and 31 they will be guided to the parafiine rollers by the guides 50. The surfaces of the rolls 6 and 7 being thoroughly saturated with hot parafline, the warm cartons will now be given a coat of parafiine on both sides by passing between said rolls and will be gripped as they emerge by the belts 10 and 10 on the rollers 53 and 54C respectively. The cartons are now carried through the tank 11 beneath the surface of the water by the coacting belts 10 and 10 the spaces between said belts allowing the water to thoroughly cool the cartons. Upon emerging from the cooling bath the cartons pass between the squeeze rollers 12 and 13 (where substantially all of the adhering water is removed) and are then projected onto the jogging table belt 61. The speed of this belt is arranged so that the cartons will be spaced at proper intervals to cause them to 'be piled uniformly and its length permlts said cartons to be observed for defects. Asthe belt 61 This belt travels to' table to said belts,

receive said cartons belts mounted on said rollers, means for described my invention what I I heating said belts, a pair of coating rolls journalled in said frame, one above the other, said belts being arranged to pre-heat the material to be coated and to deliver the same to said coating rolls and means for supplying coating material to said rolls.

2. In a coating machine, a frame, a table, for the material to be coated, tiltably mounted on said frame, wheels journalled in said frame above said table, a pair of dry endless belts mounted one above the other in said frame and arranged to receive the material to be coated from said table, means for heating said belts, coating rolls journalled in said frame at the end of said belts and means for supplying coating material to said rolls.

3. In a coating machine, a frame, a feed table tiltably mounted in said frame and adapted to receive a plurality of carton blanks, endless belts mounted in said frame, means for heating said belts, means for feeding cartons one at a time from said coating rolls journalled in said frame and adapted to receive cartons from said belts, means for supplying coating material to said rolls and means for cooling the cartons comprising a tank adapted to receive water and a plurality of laterally spaced, endless belts arranged from said rolls and to submerge said cartons in said tank.

4. In a coating machine, a frame, a pair of arms mounted on saidframe, a pivotal support for one end of each of said arms, adjustable supports for the free ends of said arms, a coating roll journalled in the free ends. of said arms, a second coating roll journalled in said frame beneath said first roll, a vat beneath said lower roll and means for supplying coating material to said upper roll.

In testimony subscribed my name to this specification.

CHARLES G.GAMM.

whereof, I havehereunto 

